\documentclass{article}
\usepackage{amssymb,amsmath,amscd,concmath}
\pagestyle{empty}
\begin{document}
\begin{equation*} \frac{1}{2} \cdot \frac{No}{No} \cdot \frac{No}{No} \cdot \frac{No}{No} \cdot \frac{No}{No!} \cdot \frac{No}{No} \cdot \frac{No}{No} \cdot \frac{8}{9} \cdots = \frac{\pi}{2} \end{equation*}
\end{document}
